I didn't try to field that question since I've got no personal experience, only reading and watching YouTubers do it. But, my understanding is that after grinding, the ways get scraped in and then "flaked" which are small semi-swirls scraped into the way surface to create oil pockets. If a lot is removed during grinding, the way surfaces might be built back up with Turkite (sp?). The Turkite is then scraped just like a regular CI way would be. Maybe there are differences when you have chromed ways, I don't know.
Maybe throw up a post in the scraping forum on this list and you'll get some more experienced answers.
Ted